Bernerd eilers



Patented July l2, I898.

2 Sheets-Sheet I.

/L\/= Attorneys B. EILERS.

WOOD GRINDER FOR PULP MAKING.

(Application filed Dec. 21, 1896.)

J x N O 3 m N\ m d 3 4m ob I J P \w 5 s QN NM M QM in (No Model.)

Witnesses.

No. 607,026. Patented July l2, I898.

B. EILERS.

WOOD GRINDER FUR PULP MAKING.

(Application filed Deal 21, 1896.)

2 Sheets-Sheet 2.

No Model.)

I nv'entor.

Witnesses.

Atto rney I'KE mama inm co wonm stone or cylinder on a shaft 3, supported in Mrs STATES BERNERD EILERS, OF ROCHESTER, NEWV YORK, ASSIGNOR OF ONE-HALF TO YVILLIAMJX. MURPHY, OF SAME PLACE.

WOOD-GRINDER FOR PU LP-IVIAKING.

SPECIFICATION forming part Of Letters Patent No. 607,026, dated July 12, 1898.

Application filed December 21,1896. gerial No 616,494. (No model.)

T0 (0% whowt it may concern:

Be it known that I, BERNERD EILERs,.of Rochester, in the county of Monroe andState of New York, have invented certain new and useful Improvements in \Vood-Grindersfor Pulp-Making; and I do herebydeclare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals marked thereon.

My presentinvention relates to wood-grinding machines for making papel pulp, andpa'ra ticularly to that class described in my prior patent, No. 402,425, dated April 30, 1889, in which the wood-pockets are arranged radially around the grindingstone or'cylinder and the pressers operating in wood-pockets approximately diametrically opposite are con nected for simultaneous operation in the same direction relative to the portion of the cylinder-surface with which they cooperate; and it has for its objects to simplify and improve the construction and operation of the means for operating said pressers, all as will be hereinafter fully described, and the novel features pointed out in the claims at the end of this specification.

In the drawings, Figure 1 is a side elevation, partly in section, of a grinding-machine embodying my invention; Fig. 2, an end elevation of the same; Fig. 3, a section on the line m a: of Fig. 1.

Similar reference-numerals indicate similar parts. r

In the embodiment shown in the drawings, 1 1 indicate the side frames; 2, the grinding suitable bearings and driven by a powerful motor. Arranged around the stone are a series of pockets or chambers for containing the wood to be ground, four being shown in the present instance, (indicated by 4, 41, 42, 43,) formed by plates 5 and 6,'the' plates 5 being located on the draw? sides of the pockets and adjustable by screws50, so as to be kept close to the stone as it wears, and the plates 6 may be also adjusted, but their adj ustment is not a matter of so much moment. The pockets are also provided with apertures wood blocks through the doors 7.

in their sides, having suitable doors 7, and

through which they may be filled. The woodpockets in'the present'embodiment are arranged with their center lines:extending approximately radiallyfromthe stone, but slightly'tangential to the axis of the stone, the center lines of the tw'o'upper pockets being slightly above the stone-axis and those of the two lower pockets slightly-below it, and the pressers or plungers 8, operating in the pockets to press the wood; upon the stone, move in the plane ofthebenter lines toward and fromthe stone, In this construction also the pressers in theTtwo pockets approximately diametrically opposite the center of the stone are connected for simultaneous operation toward and from the stone-surface, and the pairs of pressers so connected are connected together in such manner that when one pair of pressers-say those operating in pockets 4 43is moved toward the stone to crowd the wood thereon one pressersay in 4--will tend to lift the stone and the other in pocket 43 to move it down, thus equalizing the pressure on the shaft-bearings, and at the same time the pressers in pockets 41 42 of the other pair will be moving outward to open the pockets in which theyoperate and permitthe insertion of When the wood in the pockets 4 48 has been ground, a reversal of the operating or motor device will press the wood in pockets 41 42 on the stone (the pressurebeing equalized as before) and open the pockets 4 43, and so on as long as the machineris in operation, the grinding being practically continuous, no dead-strokes of the pressers being permitted and the pres sure on the stone-being equalized.

In the present machine each of the pressers Sis provided on its rear side with an exten- 'sion 9, upon which are formed racks 10, and on the sides of the extensions opposite the racks are guides in the form of rollers 11, mounted on arbors 12, supported in the sides 1 0i the' frame, said arbors being journaled in the frame, or the rollers may be loose on the arbors, if desired. The racks 10 of the pressers on the same side ofthe machine project toward each other and mesh with gears 13 between them, arranged on arbors 14, journaled in the side frames, and the ends of each of the arbors 14 (one of which is arranged on each end of the machine) are provided with gears 15, meshing with racks 16, secured to the ends of a reciprocating rod 17, having a piston 18 thereon, operating in a hydraulic cylinder 19 at the side of the machine.

20 indicates a valve for controlling the passage of fluid to the cylinder, and 21 the supply and 22 the exhaust pipes.

The connections between the piston-rod and the gears and pressers are, as shown, such that when the rod is moved to the right the pressers in pockets 4 and 43 will be moved toward the stone, pressing the wood against it, and the pressers 41 and 42 will be moved away from the stone, opening the pockets and permitting them to be filled through the doors 7, and when the piston is reversed the wood in pockets 41 and 42 will be pressed on the stone, opening pockets 4 and 43, which may be filled when opened sufficiently, as before, and thus the operation is continued, the operator being only required to fill the empty pockets and reverse the motor devices actuating the pressers.

The feature of actuating the pressers by the gears between adjacent ones is advantageous in that I am enabled to preserve the type of machine and vary in different ones the inclination of the pocket-s and their arrangement around the stone and also to change the connections as to speed and power with the presser-motor. These changes are sometimes desirable on account of the position of the'machine, the manner in which the pulp is disposed of, and the size of the stone. It will also be noted that when the stone is worn to a considerable extent the power applied to the pressers will be the same, notwithstanding the fact that the edges of the operating-faces of adjacent ones are closer together than when the stone is large, and the pressers do not move so close to the axis of the stone.

It is of course not necessary that two racks be employed on each of the pressers, as a single one would answer the purpose, but I prefer to employ two to insure suhicient strength and positive action, as the power required to operate the pressers properly is considerable.

I have not deemed it necessary to show herein devices for supplying water to the stone or the other details which are common to machines of this general class and are well known to those skilled in the art.

I claim as my invention- 1. In a grinder, the combination with the grinding-cylinder, and a series of wood-pockets arranged around its periphery, of a seriesof pressers, one in each pocket, having the racks thereon facing each other in pairs, and gears arranged between the racks on adjacent pressers and engaging both of them, and means for rotating said gears in opposite directions alternately, whereby one presser of each pair engaged by a gear will be moved toward and the other from the cylinder, simultaneously.

2. In a grinder, the combination with the grinding-cylinder, and aseries of wood-pockets arranged around its periphery, of a series of pressers or plungers, one for each pocket, and each having a rack thereon, the gears engaging directly with both the racks on adjacent plungers, and motor devices for operating said gears in opposite directions alternately, substantially as described.

3. In a grinder, the combination with the grinding-cylinder, and two pairs of pockets arranged around its periphery, each pair embodying the two pockets on approximately diametrically opposite sides of the cylinder, of a presser or plunger operating in each pocket, and having a rack thereon, gears engaging directly with the racks of adjacent pressers, and motor devices for rotating said gears in opposite directions alternately, substantially as described.

4. In a grinder, the combination with the grinding-cylinder, and the pockets 4, 41, 42, 43, the pressers 8, each having a rack thereon, the arbors 14 having the gears 13 thereon meshing with the racks, the gears 15 on the arbors, the piston-rod 17 having racks 16, the piston 18, and the cylinder in which it operates, substantially as described.

5. In a grinder, the combination with the grinding-cylinder, and two wood-pockets at the periphery thereof, of the pressers operating in the pockets having the racks thereon, the single gear meshing with both the racks, and power mechanism for actuating the gear in opposite directions alternately, substantially as described.

6. In a grinder, the combination with the grinding-cylinder, and two wood-pockets 011 each side of the vertical diameter of the cylinder, one above and the other below the horizontal plane of the shaft, of the pressers operating in said pockets having the racks thereon, two gears, one engaging with the racks of each pair of pressers on one side of the vertical diameter of the cyllnder, and reversible motor devices for rotating both gears in the same direction, substantially as described.

BERNERD EILERS.

"Witnesses:

F. F. CHURCH, G. A. RODA.

ICS 

